George newton



(Model.)

G. NEWTON.

WATOH KEY.

No. 303,660. Patented Aug. 19, 1884..

WITNEEEEE,

GEORGE NEWTON, OF HAVANA, CUBA..

WATCHMEY.

S ECIFICATION forming part of Letters Patent No. 303,660, dated August 19, 1884.

Application tiled March l, ISM. (Model.) Patented in Spain April-1, i883, No. 2,822.

.To {zZ/ whom it may concern:

Be it known that l, GEORGE NEWTON, a citizen of the United States, residing in Havana, Cuba, have invented certain- Improvements in fateli-Keys, of which the following is a specification.

My invention relates to watch-keys; and it consists in. constructing the samein the form of a ilat-faced disk, convex on its under face, reduced to a thin edge at its periphery, and provided with a central hole to iit the winding and the setting arbors of the watch to which it is to be applied.

The object of this invention is to produce a key which may be applied to all key-winding watches now in use and to such as are still be ing manufactured, and which may be left in position in the watch at all times, though capable of transfer from one arbor to the other when required. i

In the accompanying drawings, Figure 1 is a perspective view of my improved key, somewhat enlarged (in the drawings as filed herewith Fig. 2, a sectional view of awatchcase, showing my key inv position for use, the key being likewise in section; Fig. 3, a face view of the watch, showing a hole in the crystal for setting the handsa plan adopted for such watches asset from the face. l

Keys have heretofore been made in the form of a striated disk of considerable thickness at its edges, seated in a cavity having upright walls, the disk being permanently secured to the arbor of the watch; but such keys do not serve the purpose of mine, because, first, they require a special construction of the watch and its case during the process of manufacture in order to adapt it to receive the key,

` and because the watch cannot be subsequently adapted to receive the key except by discarding its original case and providing a new one. Other keys have been made with a hub or disk to screw upon a threaded arbor; but as arbors of watches as manufactured are never threaded, it is necessary to take the watch apart, draw the temper of the arbors, thread, and retemper them before the key can be applied, and when such change or adaptation is made the watch cannot be wound with the ordinary key, which is an important advantage of my plan,

" guishable.

Accordingto my invention the key is so formed that the inner dome of any key-winding watch may be readily depressed or sunk about the winding and setting holes, to per mit the disk to be seated in the depression fiush with the face of said deine; and with this purpose in view, I construct the key in the form of a thin disk, A, roughened on its upper face, beveled or rounded on its under face, to reduc-e it to a thin edge at the periphery, and provided with a central hole, B, of any required form and size to fit the winding and setting arbors of a watch, said hole pass ing through the disk and through its barrel C. as shown. rIhe disk being thus ,reduced at the periphery, and of but moderate thickness in the middle, requires only a very shallow seat, which is formed by so slight a depression of the inner dome, D, of the watch that the boundaries of the seat are scarcely distinrIhis seat may therefore be made quickly and easily in the dome or inner lid of any watch, either by a few light blows with a jewelers hammer or by a punch or die of the form required. Such a `seat can easily be formed without marring or dislignring the dome in the least, and, in fact, when made is scarcely noticeable, nothing being removed or cut away.

rIhe disk may be roughened in any convenient manner, perforated, or made in the form of a star or other iigure, to cause the thumb or finger to take a firm hold when pressed there on and turned in the proper direction for winding. In practice, I prefer to roughen the disk by forming beards or teeth a., similar to thoseof a rasp, the beveled or inclined faces turned in the direction of winding, so that when the finger or thumb is pressed upon the disk and turned in the direction of winding the iinger will take a firm hold on the disk; and turn it, but that if turned backward the nger will ride over the beards or teeth, and thereby prevent the backward rotation of the disk and consequent injury of the ratchet or click. i

The key being placed upon the arbor, as in Fig. 2, is ready for use, carries no dirt into the watch, because continuously retained in the watch, and is less liable to be lost than if carried loosely in the pocket.

IOO

VMM with huhffl, nszuu flu' Ihn pulpoun Hut lu'l'h.

GPKHNN 'VICWWUN. 

